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74ALS253N PDF даташит

Спецификация 74ALS253N изготовлена ​​​​«NXP Semiconductors» и имеет функцию, называемую «Dual 4-input multiplexer 3-State».

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Номер произв 74ALS253N
Описание Dual 4-input multiplexer 3-State
Производители NXP Semiconductors
логотип NXP Semiconductors логотип 

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74ALS253N Даташит, Описание, Даташиты
INTEGRATED CIRCUITS
74ALS253
Dual 4–input multiplexer (3–State)
Product specification
IC05 Data Handbook
1991 Feb 08
Philips
Semiconductors









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74ALS253N Даташит, Описание, Даташиты
Philips Semiconductors
Dual 4-input multiplexer (3-State)
Product specification
74ALS253
FEATURES
3-State outputs for bus interface and multiplex operation
Common select inputs
Separate output enable inputs
DESCRIPTION
The 74ALS253 has two identical 4-input multiplexers with 3-State
outputs which select 2 bits from four sources by using common
select input (S0, S1). When the individual output enable (OEa,
OEb) inputs of the 4-input multiplexers are High, the outputs are
forced to a High impedance (Z) state.
The 74ALS253 is the logic implementation of 2-pole, 4-position
switch being determined by the logic levels supplied to the common
select inputs.
To avoid exceeding the maximum current ratings when the outputs
of the 3-State devices are tied together, all but one device must be
in the High impedance state. Therefore, only one output enable
must be achieved at a time.
TYPE
TYPICAL
PROPAGATION DELAY
74ALS253
7.0ns
TYPICAL
SUPPLY CURRENT
(TOTAL)
8mA
PIN CONFIGURATION
OEa 1
S1 2
I3a 3
I2a 4
I1a 5
I0a 6
Ya 7
GND 8
16 VCC
15 OEb
14 S0
13 I3b
12 I2b
11 I1b
10 I0b
9 Yb
SF00798
ORDERING INFORMATION
ORDER CODE
DESCRIPTION
COMMERCIAL RANGE
VCC = 5V ±10%,
Tamb = 0°C to +70°C
16-pin plastic DIP
74ALS253N
16-pin plastic SO
74ALS253D
16-pin plastic SSOP
Type II
74ALS253DB
DRAWING
NUMBER
SOT38-4
SOT109-1
SOT338-1
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS
DESCRIPTION
74ALS (U.L.)
HIGH/LOW
I0a – I3a
Port A data inputs
1.0/1.0
I0b – I3b
Port B data inputs
1.0/1.0
S0, S1
Common select inputs
1.0/1.0
OEa
Port A Output Enable input (active-Low)
1.0/1.0
OEb
Port B Output Enable input (active-Low)
1.0/1.0
Ya – Yb
3-State outputs
130/240
NOTE: One (1.0) ALS unit load is defined as: 20µA in the High state and 0.1mA in the Low state.
LOGIC SYMBOL
IEC/IEEE SYMBOL
LOAD VALUE
HIGH/LOW
20µA/0.1mA
20µA/0.1mA
20µA/0.1mA
20µA/0.1mA
20µA/0.1mA
2.6mA/24mA
6 5 4 3 10 11 12 13
14
2
0
2
G
0
3
I0a I1a I2a I3a I0b I1b I2b I3b
14 S0
2 S1
1 OEa
15 OEb
Ya Yb
VCC = Pin 16
GND = Pin 8
79
SF00799
1
MUX
EN
60
51
42
33
15
10
11
12
13
7
9
SC00073
1991 Feb 08
2 853–1378 01670









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74ALS253N Даташит, Описание, Даташиты
Philips Semiconductors
Dual 4-input multiplexer (3-State)
Product specification
74ALS253
LOGIC DIAGRAM
OEa I0a
16
I1a I2a
54
I3a S1 S0 I0b I1b I2b I3b OEb
3 2 14 10 11 12 13 15
VCC = Pin 16
GND = Pin 8
7
Ya
9
Yb
SC00074
FUNCTION TABLE
INPUTS
S0 S1 I0 I1 I2
XXXXX
L L LXX
L LHXX
HLXLX
H L XHX
L HXX L
LHXXH
HHXXX
HHXXX
H = High voltage level
L = Low voltage level
X = Don’t care
Z = High impedance “off” state
I3 OEn
XH
XL
XL
XL
XL
XL
XL
LL
HL
OUTPUTS
Yn
Z
L
H
L
H
L
H
L
H
ABSOLUTE MAXIMUM RATINGS
(Operation beyond the limit set forth in this table may impair the useful life of the device.
Unless otherwise noted these limits are over the operating free air temperature range.)
SYMBOL
PARAMETER
VCC
VIN
IIN
VOUT
IOUT
Tamb
Tstg
Supply voltage
Input voltage
Input current
Voltage applied to output in High output state
Current applied to output in Low output state
Operating free-air temperature range
Storage temperature range
RATING
–0.5 to +7.0
–0.5 to +7.0
–30 to +5
–0.5 to VCC
48
0 to +70
–65 to +150
UNIT
V
V
mA
V
mA
°C
°C
RECOMMENDED OPERATING CONDITIONS
SYMBOL
PARAMETER
VCC
VIH
VIL
IIK
IOH
IOL
Tamb
Supply voltage
High-level input voltage
Low-level input voltage
Input clamp current
High-level output current
Low-level output current
Operating free-air temperature range
LIMITS
MIN NOM MAX
4.5 5.0 5.5
2.0
0.8
–18
–2.6
24
0 +70
UNIT
V
V
V
mA
mA
mA
°C
1991 Feb 08
3










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